*{
    padding: 0;
    margin: 0;
}
.base_bg{
    background-color: #f6f6f6;
}
.f16{
    font-size: 16px;
}
.f14{
    font-size: 14px;
}
.hand{
    cursor: pointer;
}
.left{
    float: left;
}
.right{
    float: right;
}
a{
    display: inline-block;
    text-decoration: none;
    text-underline: none;
}